Networking Hardware Review Quiz: Trivia

A switch is the best choice for preventing collisions on a network by creating separate collision domains and defining virtual LANs. A switch operates at the data link layer of the OSI model and uses MAC addresses to forward data only to the intended recipient. This allows for dedicated bandwidth for each device connected to the switch, reducing the chances of collisions. Additionally, switches can be configured to create virtual LANs (VLANs), which further segregate network traffic and enhance security.

Workstation2 will use the default gateway address 192.168.10.1. The default gateway is the IP address of the router that connects the local network to external networks. In this scenario, the router with the IP address 192.168.10.1 is the default gateway for Workstation2.

A switch would best reduce the number of collisions and provide for future growth in this scenario. A switch is a connectivity device that operates at the data link layer of the OSI model and uses MAC addresses to forward data packets only to the intended recipient. Unlike a hub, which broadcasts data to all connected devices, a switch creates separate collision domains for each port, reducing the likelihood of collisions. Additionally, a switch can handle higher network traffic loads and provide better performance compared to a hub. Therefore, implementing a switch would help alleviate the issue of slow file transfers caused by collisions and support the company's future growth.

The correct answer is "copy tftp run" because this command is used to copy a file from a TFTP server to the running-config on the router. The "tftp" keyword indicates the source of the file, which is the TFTP server, and the "run" keyword indicates the destination, which is the running-config on the router.

Fragment free is the frame processing method that causes a switch to wait until the first 64 bytes of the frame has been received before forwarding the frame to the destination device. This method is designed to prevent forwarding of frames with errors by checking the first 64 bytes for any errors or collisions. Once this initial portion of the frame is received without errors, the switch forwards the entire frame to the destination device.

TCP is a connection-oriented protocol that ensures reliable and sequenced delivery of data, but it has a high overhead due to the additional control mechanisms it employs. On the other hand, UDP is a connectionless protocol that does not guarantee reliability or sequencing of data. It has a low overhead since it does not have the same level of control mechanisms as TCP. Therefore, the given answer accurately describes the characteristics of TCP and UDP.

Keeping the router in a locked room is the most important thing to do to prevent console access to the router. This ensures that only authorized personnel have physical access to the router, reducing the risk of unauthorized console connections. Disconnecting the console cable when not in use and setting console and enable secret passwords are also important security measures, but they do not provide the same level of physical protection as keeping the router in a locked room. Implementing an access list can help control network access, but it does not specifically address console access.

Cisco Express Forwarding (CEF) is an internal routing logic that organizes routing data using a tree structure for very fast searches. It improves the efficiency of packet forwarding by maintaining a Forwarding Information Base (FIB) and an adjacency table. CEF allows for faster packet routing as it does not require the router to perform a route lookup for every packet, reducing the time needed to route packets. It is a key feature in Cisco routers and is commonly used in high-performance networks.

The correct answer is "copy flash tftp". This command is used to copy the IOS image from the router's flash memory to the TFTP server with the specified IP address. The "copy" command is used to copy files, the "flash" keyword specifies the source file location in the router's flash memory, and "tftp" specifies the destination server.

The correct answer is E. The E port is typically used for connecting a router to a CSU/DSU using a serial connection. CSU/DSU stands for Channel Service Unit/Data Service Unit, which is a device used for connecting a router to a digital circuit, such as a T1 or T3 line. Serial connections are commonly used for long-distance connections and require a specific port on the router for proper communication.

Fiber optic cables with LC connectors are the best choice for connecting the two buildings in order to minimize electromagnetic interference. Fiber optic cables use light signals to transmit data, which is immune to electromagnetic interference. Additionally, LC connectors provide a secure and reliable connection between the cables and the switch. 1000BaseLX Ethernet is the appropriate type of Ethernet for this setup, as it supports long-distance transmissions over fiber optic cables.

To establish a console session to a new router using a Telnet session, you will need an Ethernet port on your computer to connect to the router. An IP address is also required to establish the connection. Additionally, an Ethernet cable is needed to physically connect the computer and the router. The other options mentioned, such as the rollover cable, console port, and serial port, are not necessary for establishing a Telnet session.

Sequencing helps to detect lost packets by assigning a unique sequence number to each packet. When the receiver receives the packets, it can check if any packets are missing by comparing the received sequence numbers with the expected sequence numbers. If there is a gap in the sequence numbers, it indicates that some packets were lost. Acknowledgements also help in detecting lost packets by requiring the receiver to send an acknowledgment message back to the sender for each received packet. If the sender does not receive an acknowledgment for a particular packet, it can assume that the packet was lost.

Routers use logical network and device addresses to route data between networks. They examine the destination device address contained in packets to make routing decisions.

The correct answer is RJ-45 rollover cable. The console port on a router typically uses an RJ-45 connector, and a rollover cable is used to connect to it. A rollover cable is a special type of Ethernet cable where the pinouts on one end are reversed compared to the other end. This allows the router's console port to communicate with a computer or terminal using a serial connection.

When a Cisco router fails to locate a valid IOS image in the flash memory or on a TFTP server, it will enter ROM monitor mode. In this mode, the router allows the user to perform low-level troubleshooting and recovery tasks. From the ROM monitor mode, the user can then proceed to load a valid IOS image onto the router.

The 802.1Q Trunking Protocol offers the primary advantage of being able to be used with a mix of Cisco and non-Cisco devices. This means that it is compatible with a wider range of devices and allows for greater flexibility in network design and implementation. Additionally, being an IEEE standard, it ensures interoperability and compatibility with other networking equipment.

By implementing Cisco Express Forwarding and Fast Switching, you can improve routing efficiency by enabling routers to save frequently used data link headers used to encapsulate packets. Cisco Express Forwarding uses a Forwarding Information Base (FIB) to store precomputed next-hop information, allowing for faster packet forwarding. Fast Switching, on the other hand, stores a cache of commonly used destination addresses, allowing for quicker processing of packets. By using these routing logic methods, routers can minimize the time and resources required for routing, resulting in improved efficiency.

A switch functions by connecting multiple network segments and forwarding packets to the appropriate segment. Additionally, it filters the network traffic based on hardware addresses.

To establish a remote console session with the router, you would use "admin" as the username and "television" as the password. Additionally, you would need to run SSH (Secure Shell) to establish the secure connection. This would allow you to remotely access and manage the router's console.

A switch reads the MAC address in a frame and makes forwarding decisions based on that address. This is because a switch operates at the data link layer of the OSI model and uses MAC addresses to determine where to forward incoming frames. The collision domain on a switch is all devices connected to a single switch port. This means that devices connected to different switch ports will have separate collision domains, reducing the chances of collisions and improving network performance.

A Switch Virtual Interface (SVI) on a multi-layer switch is treated as a physical link through which the switch can route traffic. It is mostly implemented to interconnect the VLANs between distribution and access switches in a multi-switched network. This means that the SVI acts as a virtual interface that allows communication between different VLANs on the network. It is not associated with a particular VLAN and does not support sub-interfaces.

The correct answer is "copy start tftp" because this command is used to copy the startup configuration file from NVRAM to a TFTP server. In this case, the TFTP server has the IP address 192.168.1.10. By using this command, the configuration file will be saved as a backup on the TFTP server for future use.

The correct answer is to connect the laptop's COM port to the router's console port using a rollover cable and to connect the laptop's Ethernet port to the router's Ethernet port using a crossover cable. This is because the COM port is used for console management and configuration of the router, while the Ethernet port is used for data transmission. The rollover cable is specifically designed for connecting the COM port to the console port, while the crossover cable is used to connect similar devices, such as a laptop and a router, together.

Extended IP access lists allow you to filter traffic for a specific TCP/IP protocol and filter traffic based on destination IP addresses. Standard and extended lists both allow you to assign more than one list to each interface, log traffic that matches access list entries, filter traffic based on source IP addresses, and permit or deny TCP/IP traffic. Therefore, the statements that apply only to extended IP access lists and not to both standard and extended lists are "You can filter traffic for a specific TCP/IP protocol" and "You can filter traffic based on destination IP addresses."